/**
* @param QueueItem $queueItem
*/
protected function safeSend(QueueItem $queueItem)
{
$now = new \DateTime("now");
$queueItem->setAckedAt($now);
$this->saveQueueItem($queueItem);
$message = $queueItem->getMessage();
$campaign = $message->getCampaign();
$template = $campaign->getTemplate();
$subscriber = $queueItem->getSubscriber();
$this->messageBuilder->setEntityVars($message, $campaign, $template, $subscriber, $queueItem);
$headers = $this->messageBuilder->getHeaders();
$messageBody = $this->messageBuilder->getBody($message->getBody(), $template->getBody());
$subject = $this->messageBuilder->template($message->getSubject());
$this->mail($subscriber, $campaign, $subject, $messageBody, $headers);
$queueItem->setSentAt($now);
$this->saveQueueItem($queueItem);
}